Improvement in self-win ding watches



UNITED STATES PATENT OFFICE.

DON J. MOZART, OF ANN ARBOR, MICHIGAN.

IMPROVEMENT IN SELF-WINDING WATCHES.

Specification forming part of Letters Patent No. 141,373, dated JulyQQ,1873; application filed May 14, 1873.

To all whom it may concern:

Be it known that I, DON J. MOZART, of Ann Arbor, in the county ofWashtenaw and in the State of Michigan, have invented certain new anduseful Improvements in Watches; and do hereby declare that the followingis a full, clear, and exact description thereof, reference being had tothe accompanying drawings and to the letters of reference markedthereon, making a part of this specification.

The nature of my invention consists in the construction and arrangementof an automatic winding device for watches, as will be hereinafter morefully set forth. It also consists in particular devices for setting thehands.

In order to enable others skilled in the art to which my inventionappertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the annexed drawing, in which-A Figure l is a view of the inner casing. Fig. 2 is a longitudinalsection of the same. Figs. 3, 4, and 5 are detached views of certainparts thereof'.

A represents the cap or interior casing, in which the works of a watchare inclosed. B represents the main driving wheel of the watch, with aframe, O, and central shaft a, said shaft and wheel being connected bythe usual pawl-andratchet movement. D represents the mainspring of thewatch, placed within the frame O, and its inner end attached to theshaft a, while thc other end is attached to the wheel B or frame O, inthe usual manner. On the shaft a, in a recess in the upper surface oftheframe C, is attached a wheel, b, having a single tooth, as shown in Fig.3, and this singletoothed wheel gears with another whee1,d,pivoted alsoin a recess on the frame O, and provided with three or more cogs, andhaving also a beveled flange or projection, e, on its upper surface. Theshaft a extends through the casing A, and has lupon its outer end acog-wheel, f, which gears with a similar cog-wheel, f', pivoted on thecasing. Both of these wheels are provided with three cams or teeth, t'i, on their upper surface, as shown in Fig. I. h represents a pawlengaging with the cog-wheel f, and provided at its pivot end with aprojecting arm, m, upon which a spring, a, bears to hold the pawlagainst the cogwheel f., On the under side of the casin g A is a rockingplate, p, through the inner end of which the shaft a passes, and theouter end is provided with a pin, s, passing through a slot in thecasing directly against the inner side of the arm m on the pawl It. Grepresents a part of the outer hinged casing of the watch, which, by ahinged bar, E, is connected with a sliding bar, I, moving in slotsimmediately beneath or on the inside of the interior casing A 5 and tothis sliding bar is connected a tooth or projection, J, by means of ascrew or stud, t, said tooth or projection being located on the outerside of the interior casing A, and the screw passing through a slot insaid casing. The tooth or arm J is of such size as to t over thecog-wheels ff', and between the cams t' vl on the same. As the outerCasin g G is opened to see the time, it moves the sliding bar I so thatthe arm J will operate against one of the cams t' on the cog-wheelf, andturn the same one-third of a revolution. This wheel being of the samesize as and gearing with the wheel f, this latter wheel is also revolvedone-third of a revolution, and as this wheel f is secured on the shafta, and the inner end of the spring D attached to said shaft, the springwill he wound up just that much, and the pawl h, engaging with the wheelf, will prevent the same from turning back. Upon closing the outer casethe slide I is moved in the opposite direction, causing the arm J tooperate on one of the cams of the wheel f, turning the same againone-third of a revolution, and winding the spring up that much more.These devices are so arranged that opening and closing the outer casefive or six times will wind up the spring completely; and to prevent itsbeing wound too tight and breaking, I employ the wheels b and d androcking bar p. For each revolution of the shaft a, the single-toothedwheel b will turn the wheel d the distance of one tooth or cog, so thatwhen the spring has been wound up sufficiently tight, the flange c onthe wheel d will come against and force up the inner end of the rockingbar or plate p. This causes the pin s at the outer end of this bar orplate to force the pawl h away from the cog-wheel f; and when the pawlis away from the said wheel, the outer case may be opened and closed asoften as desired without interfering with the spring, because the wheelsfand f/ will then return to their places as soon as they are turned bythe arm J.

As it is not probable that any Watch, when in use, will be opened lessthan five or six times during twenty-four hours, there is no othermanipulation of any kind required to keep the Watch Wound up.

Through or under the dial-plate of the watch is passed a shaft, r,extending from the circumference to nea-r the center, and carrying onits inner end a pinion, w, to gear with a wheel connected with the handsof the Watch in such a way that by turning the shaft e the hands may beset. The shaft t* is, at its outer end, provided With a knob, and asprin g, y, is suitably arranged to throT the shaft outward far enoughto disengage the pinion w from its cog-wheel. When it is necessary toset the hands, the shaft 'v is pressed inward, and turned by its knob Krepresents the regulating hand, on the pivot or shaft of which isattached a pinion, e, on the under side of the interior casing A. Thispinion gears with a cogged segment, L, to which the hairspring of theWatch is to be attached. By

this means the Watch may be regulated to a incety, as a comparativelylarge movement of the hand K effects only a small movement of theregulating-segment L.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

l. The combination of the hinged part G of the outer casing, theconnecting-bar E, slide I, With tooth or arm J, and the Wheels ff',having the cams t' i, substantially as and for the purposes herein setforth.

2. The combination, with the shaft a and mainspring D, of the cog-Wheelsf f', with camsz i, and the spring-pawl h, constructed and arrangedsubstantially as and for the purposes herein set forth.

3. The combination of the single-toothed Wheel b, Wheel d, with flangee, and the rocking bar p, with pin s, constructed and arrangedsubstantially as and for the purposes herein set forth.

In testimony that I claim the foregoing I have hereunto set my hand this2d day of May, 1873.

DON J. MOZART.

Witnesses:

C. L. EVERT, A. N. MARR.

